A logical move, improving the position of the bishop and leaving room for the queen. However, the bishop can be attacked by the knight after Ne3.
2. a1b3  2... f7f5  3. e2e4 Judging by the other games, this is a kind of \"theoretical line\" from this starting position. The computer doesn't approve of this move. 3... f5e4  4. e1e4 